Automatic water-heater.



A. B. CHAPMAN. AUTOMATIC WATER HEATER.

APPLICATION FILED JUNE 2a, 190s.

Patented Nov. 10, 1908 2 SHEETS-SHEET 1.

A. B CHAPMAN. v AUTOMATIG WATER HEATER. APrLIoAT'Ion FILED JUNE 2a. 190e.

Patented Nov.10,19o.

/ Gfmzvegziar y f jaah-wey@ 30 `of the thermostatic regulator an 45 lheads 60 which latter esca e 55 and the jacket.

UNITED sTAT 1 s PATENT OFFICE.

ALBERT B. CHAPMAN, F SILVER GREEK, NEW YORK, ASSIGNOR TO HAMMOND-HOMBURGER COMPANY, OF SILVER CREEK, NEW

YORK, A CORPORATION OF NEW YORK.

AUTOMATIC WATER-HE ATER.

l Specification of Letters Patent.

Patented Nov. 10, 1908.

Application led June 28, 1906. Serial No. 323,764.

To all whom it may concern:

Be it known that I, ALBERT B. CHAPMAN, a. citizen of the United States, residing at Silver Creek, in the county of Chautauua 5 and State ofl New York, have invente a new and useful Improvement in Automatic Water-Heaters, of which the following is a specification.

This invention relates to the class of water heaters having a thermostatic regulator or agovernor for automatically controlling the salply of gas tothe burner.

ne of the objects of the invention is to improve the construction of the thermostatic l regulator with a view of facilitating the adjustment of the as valve. v

' A. further obect is to provide simple means for equa izing the temperature of diierent portions of the thermostatic member, so as to prevent premature elosinf1r of the gas valve which occurs when one enld of the thcrmostatic member is exposed to a hi her temperature than the other.

n the accompanying drawings consisting of 2 sheets: Figure 1 is a sectional elevation a water heater embodying the invention.v

Fig. 2 isn side elevation of the lower portion thereof, at right angles to Fig. 1. Fig. 3 is a longitudinal section, on an enlar ed scale, the gas valve. Figs. 4 and 5 are cross sections in lines 4-4 and 5 5, Fig. 3. Fig. 6 is a" bottom plan view of the gas valve.` Fig. 7 is a top plan view of the adjusting device of said valve.

Similar letters of reference indicate corresponding parts throughout the several views.

A is the boiler and B the. inclosing jacket 40-or casing which extends a short.distance below the saine to form the lire chamber C. In this chamber is placed a gas burner of any .suitable construction, that shown in the drawinvs comprising a plurality of burner mounted on and supplied by an annular manifold D1. The casing is Sulliciently larger in diameter than the boiler to leave an intervening passage E between these parts for the products of combustion, into the chimney throu h a flue E1 eading -from the closed to o the casino'.

orizontal bale rings c may be arranged at intervals in the space between the boiler Each of these rings is provided .with an opening for the passage of the products of combustion, the openings being arranged alternately on oppositesidcsof the boiler to 'compel such products to circulate around the same before escaping at the top of the j ackct.

In the construction shown in the drawin s, the water in the boiler is caused to circu ate through an external u ri ht pipe F having its ends connected wit t e top and the lower portion of the boiler by horizont-al pipes f, f1. To the upper portion of this circu ating .pipe is connected the cold water inlet or branch g.

H is the hot water discharge pipe leading from the top of the boiler, and H1, H2 are direct and return pipes for hot water connected respectively with the pipe H and the lower portion of the boiler and with I'which a radiator or other apparatus, not

shown, may be connected.

' I indicates a drain or cleaning pipe connectedwwith the bottom of the boiler and extendii'i'g outside of the casing B where it is provided with a faucet z'.

J. is .case which is provided at its upper end with threaded stein y' which is screwed into the lower end of the T-titting i1 connecting the pipes F, f1. 7c is a gas supply pipe connected with the inlet of the valve-case and k1 a delivery pipe leading. from the outlet of the valve-case to the manifold D1 of the main burner. An auxiliary supply pipe Z leads from the inlet branch of the valve case to the customary pilot light or supplemental burner L for constantly supplying the latter.

' lhc gas valve J closes upwardly against its scat and is prcferabl y provided with a hollow guido stom m which is fitted in an axial bore or socket m1 formed in the top or bonnet of 4the valve caso. This valve has a i'uain rod or stem fn. which passes upwardly through the valve case and through a ther'- lnostatic tube 0 arranged within the circulating pipe F and resting upon theI top of .said case. To the free upper end of this thermostatic tube is scoured a head or plug o haring a screw threaded bore with which the threaded upper cud of the valve rod lnl engages, thus compelling said rod to move with the tubo. as it .oxpands and contracts and closing or opening the gas valve accordingtv. 'lhe lower' end oi the rod fn. is

the gas-regulating valve and J1 its 4ol the water in the boileri 'equalized with that of its lower `similar lugs rigidly secured to the valve by a screwthreaded joint, as shown, or any other suitable fastening, so that upon turning the valve said rot is screwed up or down 1n the stationary plug o1, thereby adjusting the valve toward or from its seat. This con` struction permits the valve to be adjust-ed to close at the desired maximum'temperature This adjustment effected from the exterior ot the valve case by a` rotary spindle P passing through'a stuffing box in the provided at its outer end with a hand wheel for turning it. At its inner end the spindle is provided with a head p having upwardly projecting pins or projections p1 which en Atersoclrets p2 formed in the back or under'.- side of the gas valve and compel the latter to turn with the spindle. These pins are of the proper length to remain in engagement with the valve in all positions thereof.

The guide stem m insures an accurate and reliable seatin of the gas-valve, in case the screw threadedr bore of the valvewhich receives the rod a should not be absolutely straight or true.

In the upper portion of the boiler the 'temperature of the water is higher than in its lower portion and when the thermostatic tube o is equally and -directly exposed throughout its length to the water in the circulating. pipe F the upper portion of the tube becomes hotter than its lower portion, causing the gas valve to be closed prematurely or before the entire contents of the boiler are heated to the desired maximum temperature. To overcome this objection, the upper ortion of the thermostatic tube is inclosed by a hood, shield or guard g of tinned brass or other suitable material, whereby the temperature of the upper portion of the tube is reduced and practically portion, thus'msuring the heating of the entlre contents to the proper degree before the supply of gas to the main burner is shut oil'. l The shield g is preferably of tubular form and closed at its upper end, as shown in Fig. 3. than the thermostatic tube 0 to leave an in tervening passage g1 through which the water circu ates, and 1s provided near its upper end ,with air-escape openings g2. The shield is centered on the thermostatic tube lat its lower end by radial lu s or webs r formed onl one of sald parts and1r at its u per end by r1 formed on the p ugo1 The thermostatic' tube and its protecting shield o preferably terminate at or near the cold water inlet@ In the operation of the thermostat-ic regu, lator, as the temperature of thewater Ain the' boilerrses, the thermostatic .tube expands or elongates, drawin the gas 4 valve J closer 'to its seat and gra -ually reducing the gas bottom of the case and' It is somewhat larger in. diameter supply to the burner until the maximum temperature is reached. when the valve is fully closed. then the temperature falls by the drawing olli of hot water 'rom the boiler and the admission ol' cold water, the thermostatic tube contracts or shortens, opening the gas valve more or less in a manner common to this classof devices. 'ly' As the adjusting device of the gas-valve is accessible from the outer side of the valve ease, the adj ustmcnt can be quickly and conveniently effected without the necessity of removing and replacing parts as required in valves where the adjusting device is wholly within the case.

l claim as my invention:

l.l The combination oit' a ,water heater, a thermostatic member, a valve case cont-aining a reciprocating gas valve, ai' screwthreaded connection .between the front side of said -valve and the thermostatic member operating to adjust the valve by a rotary movement thereof, and a rotary adjusting device separate from said valve extendin throught-he rear side of the valve-case, sai device having means engaging the gas-valve and, permitting' longitudinal movement herlof relative thereto, substantially as set ort 2. The combination of a water heater, a

-pipe or conduit connected therewith, a -ther- 4mestatic member arranged in said pipe,' a valve-case containing a gas-valve provided with a socket, a screw threaded connection between said valve and the thermostatic member operating to adjust the valve relatively to its seat by a rotary movement of the valve, and a rotary adjusting spindle extending outwardly through-tthe valve-case and provided within the same with a pin arranged out of-line with the spindleand engaging said socket, substantially as set forth.

The combination of a water heater having a cold-water inlet, a thermostatic member under-the influence of the liquid in the heater, a gas valve controlled by said niember, and means for shieldin" said member against the direct action ofn the incoming cold water and the hot water in the upper poriion of the heater, sl'ibstantially as set ort 1.

4. The combination of a waterheater, a pipe or conduit connected therewith, a ther- -.mostatic member arranged-in said pipe, a gasvalve controlled by said member, and an equalizing'shield arranged to rotect the upper portion of saidmember romrthe direct thermal action of the water in the upper part of the heater, substantially as set forth.

The ef a water beaten-1t pipe or conduit connected therewith, a ther'` mostatic member arranged in said pipe, a gas valve controlled bysaid'member, and an ergualjg-nslljeld ,inclosiryg the uDDer 1501'- tion of said member and separated therethereof, a thermostatic member arranged from b an intervening space, substantially lengthwise in said pipe, a gas valve conyas set orth. trolled by said member, and atubplar shield 6. The combination of a water heater, a inclosingthe Upper portion of said member 5 circulating pipeexternal to the heater and and separatedtherefrom, said shield being 20 connected wlth the upper und lower portions closed at its upper end-and provided in its thereof., a thermostatic member' arranged upper ortiorr with openings, substantially v Ien hwise in said pipe, a gas valve conas set orth. .Y y 'tro ed by said member, an equalizing shield Witness my hand thisl 21st day of June, 10 innosinglthe upper portion of said member, 1906. i e

an a co -Water inlet connected with said f j vexternal pipe, substantially as set forth. ALBERF B' CHAI MAN The combination of a Water heater, a Witnesses: circulating pipe external-to the heater and THEO. L. Porr, 15 connected with the upper and lower portions C. F. GEYER. 

